From 071f79b524d4f8882ad982f3c05034a300c84580 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Afonso=20Janu=C3=A1rio?= <afonso-januario@hotmail.com>
Date: Sun, 30 Aug 2026 18:51:03 +0100
Subject: [PATCH] Mark the unordered_set in the hash regression test const
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clang-tidy's misc-const-correctness check flagged it: the set is
never mutated after construction, only read via size().

Signed-off-by: Afonso Januário <afonso-januario@hotmail.com>
Signed-off-by: Niels Lohmann <mail@nlohmann.me>
---
 tests/src/unit-hash.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/src/unit-hash.cpp b/tests/src/unit-hash.cpp
index a517291a8..1d4fde81d 100644
--- a/tests/src/unit-hash.cpp
+++ b/tests/src/unit-hash.cpp
@@ -145,7 +145,7 @@ TEST_CASE("hash<nlohmann::json>")
     CHECK(std::hash<json> {}(json(-1)) == std::hash<json> {}(json(-1.0)));
 
     // a std::unordered_set relies on this same consistency between == and hash
-    std::unordered_set<json> numbers {json(0), json(static_cast<unsigned>(0)), json(0.0)};
+    const std::unordered_set<json> numbers {json(0), json(static_cast<unsigned>(0)), json(0.0)};
     CHECK(numbers.size() == 1);
 }